cp-e™ QKspl™ Ford Focus ST Catted Downpipe

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Following the same successful recipe we have used for our other downpipes, our Focus downpipe replaces the choked factory pipe and its restrictive cat. The result of our efforts is reduced backpressure, decreased turbo spool time, and improved dyno results – more than 5% gains.

Also available without a catalytic converter.

$669.99

Matching the stock turbo, our Focus ST Catted Downpipe includes a laser cut turbo flange. This design fits flawlessly with stock Focus turbo flange. Premium American made “bright annealed” 304 stainless steel is mandrel bent throughout for less turbulent exhaust flow. We include three O2 bungs to accommodate the two stock O2 sensors. Additionally, we give the ability to easily add a wideband sensor. We offer an optional high flowing catalytic converter. The optional cat features a metallic monolithic honeycomb catalyst designed for maximum flow. For those opting out of the high flow cat, the off-road downpipe includes a cp-e™ Smart O2 Simulator to help eliminate the unwanted check engine light.

Focus ST Catted Downpipe Features

  • Laser cut turbo flange
  • Extra O2 bung for adding a wideband sensor
  • Laser cut stainless steel bracket
  • Mate to stock exhaust or 3.00” exhaust
  • Industry-leading stainless steel flex joint
  • Metallic honeycomb high flow cat (optional)
  • Full 3.00” mandrel bent 304 stainless steel
  • Titan finish to strength material, and give clean uniform finish
  • Included Smart O2 Simulator with Off-Road Downpipe
  • More than 5% gains in upper RPMs
  • Made in the U.S.A.
  • LIFETIME Warranty

Also helping to accommodate the stock mounting, cp-e™ has designed this downpipe to use the stock downpipe support mount by welding a laser cut stainless steel bracket onto each downpipe. This braket mounts the downpipe securely and provides the extra support needed to make it last a lifetime. cp-e™ has taken the extra step to supply a custom laser cut gasket with the downpipe. Specifically this mates to the stock turbo completely leak-free.

Focus ST Catted Downpipe Construction

On the outlet end of the downpipe, we have created a slip joint that allows the installer to mate it to the stock exhaust or a full 3.00” exhaust. This adapter allows the customer to buy a true full 3.00” downpipe instead of being limited to a downpipe that needs to neck down at the flange. This gives the smoothest transition to either exhaust size, and gives the option of “upgrading down the road”. Now you can have a full 3.00” downpipe without sacrificing on what exhaust you have.

Finally, the Focus ST Catted Downpipe features the all-new finish from cp-e™. This satin finish not only gives a uniform clean finish throughout, but also strengthens the stainless steel and the welds for added reliability. Made in the U.S.A. and backed by a lifetime warranty, all your bases are covered.

Focus Downpipe – The Perfect ST DP

Bare in mind, without this adapter the 3.00” downpipe will be larger than the stock exhaust flange. Consequently allowing exhaust gases to escape past the gasket. Thanks to this adapter, the customer is buying a true full 3.00” downpipe. Rather than having the limitation of a downpipe that necks down at the flange. Along with the gasket adapter, the downpipe comes with the necessary hardware needed. Additionally, this downpipe will mount to a stock exhaust system as well as an aftermarket exhaust system.

Finally, the downpipe features the all-new finish from cp-e™. This satin finish not only gives a
uniform clean finish throughout, but also strengthens the stainless steel and the welds for added reliability. Made in the U.S.A. and backed by a lifetime warranty, all your bases are covered.

cp-e™ Ford Focus ST exhaust comparison.


While this may not trip a Check Engine Light, we cannot guarantee that all of the codes will be in the “ready” state.

Not California exhaust compliant | No implied CARB certification | Off-road use only

CALIFORNIA WARNING:Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Weight 20 lbs
Dimensions 22 x 22 x 12 in

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